CVE-2013-0270

OpenStack Keystone Grizzly antes de v2013.1, Folsom, y posiblemente versiones anteriores permite a atacantes remotos provocar una denegación de servicio (excesivo consumo de memoria y CPU) a través de una petición HTTP demasiado larga, tal y como lo demuestra un tenant_name demasiado largo al solicitar un token.

The openstack-keystone packages provide Keystone, a Python implementation of the OpenStack identity service API, which provides Identity, Token, Catalog, and Policy services. It was found that Keystone did not correctly handle revoked PKI tokens, allowing users with revoked tokens to retain access to resources they should no longer be able to access. A flaw was found in the way Keystone handled tenant names in token requests. A request containing an excessively long tenant name could cause Keystone to consume a large amount of CPU and memory. With this update, the maximum HTTP request size is limited to 112k. This can be changed via the "max_request_body_size" option in "/etc/keystone/keystone.conf".